
Originally Posted by
Le Conceptuel
Honestly, no one asked my suggestion, but I'd say a Black Dragon class would suffice. We have reason to believe Wrathion is trying to revive the Black Dragonflight—there is room for three specs, too. I could see a Ranged, DPS and Tanking specialization pretty easily as a traditional magma-based, more brutish and powerful, and Earth-based specialization respectively.
There's also the Blue Dragonflight, who we know have long since broken up and are now mostly going on their own. We saw some basis for young Drake characters in Senegos' brood, and it would make more sense for them to be Drakes by now without a timeskip. However, I couldn't imagine them being very distinct—perhaps a melee Arcane (to differentiate from Arcane Mages) and a tanking Frost-based spec, but I can't see much in the way of diversity for those, nor a potential third spec.
I would say Black Dragons are the best option, since they already fulfill the most traditional Dragon archetype whilst still being somewhat distinct and interesting, and we also have concepts of what they could look like in combat with Wrathion's card art in Hearthstone. With strong, preexisting archetypes in both Neltharion pre-Cataclysm and Wrathion, the Black Dragonflight fulfills an interesting, specific, and unfulfilled niche. Although it slightly overlaps with Shaman, it does so far less than Blues would with Mages, Greens and Reds with Druids and Priests, etc. The only other Flight entirely divorced from a preexisting class would be the Bronze Dragonflight, and their time-travel spells may be more suited to a Timekeeper class than a Dragon-based class, and "time-traveling sand Dragon" is much less of a broad and appealing niche (though I personally love the thought of being a Bronze Dragon) than, say, fire-breathing manipulative Dragon.